It isn't even some controversial crazy idea Markos Moulitsas came up with, it's pretty well understood that elections in off-years, off-off-years, and of course special elections, are won by motivating turnout, specifically motivating those voters who are capable of being motivated... the base voters.
Still if the Dems get clobbered in 2010, it will inevitably be because Obama tried to ram his Marxist agenda through, and if only he'd done what more "moderate" dems, who think government should spend money on wars and subsidizing large corporations, wanted, then everything would have been fine.
Let's just hope a few of them are out of a job.